Zachery Aaron Shores-Chmielewski
db0ed79e20
Using a bounded model checker to provide absolute guarantees on runtime behavior. Signed-off-by: Zachery Aaron Shores-Chmielewski <zacheryasc@gmail.com>
33 lines
1.2 KiB
Rust
33 lines
1.2 KiB
Rust
/// The tunable settings for the runtime.
|
|
pub struct RuntimeConfig {
|
|
pub max_actors: usize,
|
|
pub channel_buffer_size: usize,
|
|
pub num_threads: usize,
|
|
/// Maximum messages processed per actor per tick.
|
|
/// Prevents a single actor with a large mailbox from starving others.
|
|
/// `0` means unlimited (drain entire mailbox).
|
|
pub actor_message_budget: usize,
|
|
}
|
|
|
|
/// 8kB for the `Box<..>` before counting the rest of the memory
|
|
const DEFAULT_MAX_ACTORS: usize = 1_000;
|
|
|
|
/// Pre-allocated ring buffer capacity for each channel (transfer, spawn, inbox).
|
|
/// When the ring is full, messages overflow into an unbounded backup queue.
|
|
const DEFAULT_CHANNEL_BUFFER_SIZE: usize = 1_000;
|
|
|
|
/// Default per-actor message budget per tick.
|
|
/// Inspired by BEAM's reduction budget (4000) and tokio's cooperative budget (128).
|
|
/// 64 is a good default: high enough for throughput, low enough for fairness.
|
|
const DEFAULT_ACTOR_MESSAGE_BUDGET: usize = 64;
|
|
|
|
impl Default for RuntimeConfig {
|
|
fn default() -> Self {
|
|
Self {
|
|
max_actors: DEFAULT_MAX_ACTORS,
|
|
channel_buffer_size: DEFAULT_CHANNEL_BUFFER_SIZE,
|
|
num_threads: 1,
|
|
actor_message_budget: DEFAULT_ACTOR_MESSAGE_BUDGET,
|
|
}
|
|
}
|
|
}
|